Patent GB-190221286-A (GB)
Title: Improvements in Unloading Apparatus.
Inventor: KINDL FREDERICK HENRY
Filed: 1902-09-30
Granted: 1903-02-05
Abstract: 21,286. Kindl, r. H. Sept. 30. Unloading; grabs; tipbuckets.-Relates to apparatus for unloading granular material, more especially ore from ships. The structure or tower 2, movable along rails 4 by means of a motor 8 and gearing, has pivoted to it at 22 a beam 21 having rails 24 for a trolley 26 carrying the elevator leg 74, and other rails for a car 161 for conveying the ore &c. from the hopper 87 to the hopper 19, which is adjustable over the desired point of discharge by means of a motor 20. The beam 21 normally occupies its raised position under the action of a counterweight, and is pulled down to its horizontal working position by drums 71 and cables 70, which are connected to the beam through springs 73, so that the beam can yield upwardly under the thrust of the digging scoop or motion of the boat. The beam counterweight carries a set of additional weights, which, as the beam 21 rises and therefore exerts less pull on the cables 63, are successively thrown out of action by engagement with stops. The leg 74 is mounted in a turntable 30, which is carried by trunnions 29 in the trolley 26 and can be tilted to any desired angle by means of worm gearing 39, 38. The trolley 26 is traversed by screw-and-nut gearing, and this and the gearing 38, 39 are operated from one motor 52 by means of clutches. Fig. 6 shows the inclined lower end of the leg, and the bucket and scoop. The leg is of rectangular section, and the bucket 77, which is of somewhat the same section, is raised and lowered in the leg by means of a cable 82 and a hail or crosshead having bearings 79 adapted to engage pins 78 in the sides of the bucket. At the lower end of its travel, the bucket enters a holder 89, the bearings 79 being disengaged from the pins 78, which then rest in the forked sides of the holder 89. The bucket-holder, when rotated on its trunnions 91, scoops up a charge of ore into the bucket by means of the blade 100 and curved part 99. The bucket holder makes one rotation, and the full bucket is then raised to a point above the hopper 87, where it is automatically tipped about side pins 85 which engage in guide-grooves in the leg. Means are provided for retaining the bucket in the holder during the rotation of the latter, and for guiding the bucket and bail in their passage up and down the leg. In a modification, the scoop part 99 of the bucket holder is pivoted to the holder, so that it can yield upwardly when scraping over the bottom of the hold. The springs 73 may then be dispensed with. The holder 89 is rotated by two chains on opposite sides of the leg, and sprocket-wheels 97, 92. The mechanism for rotating the holder 89, raising and lowering the bucket, and rotating the leg, is carried at the top of the leg, all these motions beirg obtained through clutches from a shaft driven by one motor. The clutch by which the sprocket-wheels 97 are actuated is automatically thrown out of action after one complete revolution of the sprocket-wheels by a cam. The clutch lever for the winding-drum of the bucket cable 82 is connected by levers with the drum brake in such a way that the brake is on or off according as the clutch is open or closed. The drum clutch is automatically opened by a block on the bucket cable. During the descent of the bucket, the brake is applied by an adjustable weight under the control of the operator. The leg is rotated by means of shafts 36 geared to the turntable and rotated by worm gearing. Fig. 15 shows a section of the hopper 87. The ore is delivered on to a dividing-plate 153 and guideplates 154, carried on the leg, and thence passes by the inclined plate 156 on to the bottom 152, and is delivered as required into the car 161 through a door 158. The rails on which the car 161 runs are telescopic, consisting of a pair of fixed rails 171, Fig. 18, extending to the point X, Fig. 1, and a pair of rails 172 between the rails 171, connected by links 162 to the trolley 26, and running at their other end on rollers 163.